Extension-frame for mining-drills.



G. W. MORGAN & L. EVANS.

EXTENSION FRAME P0P. MINING DRILLS.

APPLICATION FILED OUT. 15,1914.

1,133,492. Patented Mar. 30, 1915.

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GEORGE W. MORGAN AND LON EVANS, OF COMMERCE, OKLAHOMA.

EXTENSION-FRAME FOR MINING-DRILLS.

Specification of Letters Patent.

, Patented nar. so, 1era.

Application led October 15, 1914. Serial No.866,804.

To all whom t may concern.'

Be it knownthat We, (iconen W. MORGAN and LON Evans, citizens of the United States, residing at Commerce, in the county of Ottawa and State of Oklahoma, have invented certain new and useful Improvements in Extension-Frames for Mining- Drills, of which the following is a specification.

Our invention relates to mining drills, and has particular reference to improvements in extension frames therefor whereby the carriage for the movable or reciprocatory bit may be longitudinally moved or adjusted in either direction for a substantial distance, in addition to the adjustment imparted thereto by the feed screw, operating in its normal position. As is well y known, the ordinary drill employed in mines, embodies a stationary guide-shell or member, upon which is longitudinally movrying the reeiprocatory bit.

ably or adjustably mounted a carriage, car- An extension .frame is attached to the stationary member and carries a cross-head, having screwthreaded engagement with a feed screw, .employed to move the carriage longitudinally Iin either direction, toward or away from the hole being drilled. This construction has not proven wholly satisfactory owing to the fact that it is often desirable to longitudinally move or adjust the carriage in either direction, for a greater extent than can be accomplished bythe feed screw of the machine operating in the normal position, such as whenl attempting to remove the bit from the muck or when it is desired to increase the depth of the hole being drilled. The only way in which the carriage may be thus further longitudinally moved in either direction, with the ordinary type of drill, would be to bodily shift the entire machine, which requires considerable labor, and is-often highly inconvenient, if not impossible. where sutlicient hands cannot be obtained. lVe are aware that attempts have heretofore been made to overcome this disadvantage, as illustrated iu the patent to Frank T. Cook` granted July 28, 1914, No. 1,105,406. In the construction shown .in this patent removable separate supplemental rods are provided, which are adapted. to be connected with the main frame-rods, whereby the length of the extension frame majv be varied. This construction necessitates the use of quite a number of the supplemental rods of different lengths, with the cost oftheir manufacture, the inconvenience of carrying the` same from place to place and having them handy, and the difficulty and delay in securing them to the main frame rods of the frame. The inconvenience in adjusting the frame by means of these separate detach` able supplemental rods, would apparently prohibit their use by the ordinary miner.

An important object of the invention is to provide a longitudinally adjustable extension frame which is permanently attached to Ithe stationary guide-member or shell of the drill machine, such extension frame `being readily adjustable to longitudinally extend or contract the same, being sufliciently strong to etl'ectually withstand the strains to which the same is subjected, and having all parts thereof intact to be conveniently operated.

further object of the invention is to provide apparatus of the above mentioned character, which are simple in construction, inexpensive to manufacture, and highly convenient in use. I 4

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same, Figure l is a plan view of an adjustable frame extension embodying our invention, Fig. 2 is a central longitudinal section through one of the arms of the frame extension, and, Fig; 3 `is a transverse sectional view on line 3-3 of Fig. 1.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of our invention. the numeral 5 designates a relatively stationary guidemember or shell. upon which the carriage (not shownlof the drill machine. is mounted for longitudinal movement in-either direction. The reciprocatory bit is connected with this carriage for longitudinal adjustment therewith. the bit being reciprocated b v means of a compressed air or steam operated engine. as is well known. The shell 5 is supported b v any of the well known means. the same being usuall)v pivoted to be swungT in a substantially horizontal i'.

plane. 'l`he shell 5 is provided with longitudinallv extending o )omnes (i. recelvin' t. c 23 loc rods or bars 7, provided adjacent the rear end of the shell 5 with stop rings 8, rigidly connected therewith. The forward ends of the rods 7 are screw-threaded for receiving nuts 9. It is obvious that the rods 7 are securely and rigidly attached to the shell 5 as above indicated. but it is to be understood that the invention is not restricted to this precise construction.` The rear portions of the rods 7 are screw-threaded from the rings 8 to the rear ends thereof, as shown at 10.

- shown. As more clearly shown in Fig. 2, `the screw-threaded axial opening of each sleeve 11 terminates at a point 19 spaced a substantial distance from the rear end of the sleeve, providing a solid portion 14, of substantial longitudinal sectional area. Rigidly attached to the solid portion 14 and preferably formed integral therewith is a smooth extension or trunnion 15, rotatably mounted'within a transverse opening 16 formed through one end of a cross-head 17, as shown. Each trunnion or extension 15 has its outer end screw-threaded, for receiving a clamping nut 18, as shown. By providing the sleeves l1' with the enlarged solid portions 14 carrying the extensions or trunnions 15, I have found that a suitably strong swiveled connection is obtainable between these sleeves and the cross-head, which is an important point in al machine of this character, as these sleeves and cross-head are subjected to heavy strains, the engine drivf ing the reciprocatory bit being lordinarily operated by compressed air or steam under a pressure of one hundred pounds to the square inch.

The numeral 19 designates a feed screw, extending longitudinally of the extension frame and having operative connection with the carriage (not shown) to longitudinally adjust the same in either' direction. This feed screw hasv its rear end portion 20 formed smooth and journaled through an opening in the cross-head 17. A stop ring 2.1 is rigidly attached to the screw 19 forwardly of the cross-head 17, .while a sleeve 22 is rigidly attached thereto upon the opposite side of the cross-head, thus allowing the feed screw to turn but preventing longitudinal movement thereof with respect to the cross-head 17 The feed screw 19 is r0- tated by means of a hand crank 23, preferably rigidly attached to the sleeve 22.

In operation, when it is desired to move the carriage longitudinally in either direction for a greater distance than can be effected by rotation of the feed screw 19,'

operating in the normal position, the nuts 18 are properly turned, to allow of the rotation of the trunnions 15 within the openings of the cross-head 17 The lock nuts 11 are also rotated to release the sleeves 11 and to be moved a suitable distance from these sleeves, if the sleeves are to be adjusted in that direction. The sleeves 11 are now rotated in the desired direction, whereby they will be moved forwardly or rearwardly, thus increasing or decreasing the length of the extension frame, as may be desired. After the proper adjustment is thus obtained, the clamping nuts 18 are again screwed up to tightly engage the cross-head 17 and the lock nuts 11 are screwed up to bind with the forward end of the sleeves l1, thus positively preventing accidental rotation of the sleeves, or improper movement of the sleeves and cross-head, due to jars transmitted thereto in the operation of the apparatus.

lt is to be understood that the form of our invention herewith shown and described 1s to be taken as a. preferred example of the same, and that various changes in the shape, size., and arrangement of parts may be resortedv to without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described our invention, we claimz- 1. An extension frame for drill machines, comprising longitudinal screw-threaded rods having connection with the guidemember of the drill machine, a cross-head arranged near the rear ends of the screwthreaded rods, internally screw-threaded sleeves receiving the screw-threaded rods and adapted to be moved longitudinally thereon upon being rotated and having a permanent swiveled connection with the cross-head, a feed screw engaging the crosshead, and means to rotate-the feed screw.

2. An extension frame for drill machines, comprising longitudinal screw-threaded rods having connection with the guide-member of the drill machine, a cross-head arranged near the rear ends of the screw-threaded rods and provided with openings near the ends thereof` internally screw-threaded sleeves receiving the screw-threaded rods and being longitudinally adjustable there-V on vby rotation thereof kand provided near their rear ends with extensions passing through the openings of the cross-head and rotatable therein, a feed screw engaging the cross-head, and means rotating the feed 3. An extension frame for drill machines, comprising longitudinal screw-threaded rods having connection with the guide-member of the drill machine, a cross-head arranged near the rear ends of the screw-threaded rods and provided with openings near the ends thereof, internally 'screw-threaded sleeves receiving the screw-threaded rods and being longitudinally adjustable thereon by rotation thereof and provided near their rear ends with extensions passing through the openings of the cross-head and rotatable therein, a feed screw engaging the'crosshead, meansrotating `the feed screw, and lock nuts engaging the screw-threaded rods adjacent the forward ends of the sleeves to have clamping engagement therewith.

4. A frame extension for drill machines, comprising longitudinal screw-threaded rods having connection with the guide-member of the drill machine, a cross-head arranged near the rear ends bf the screw-threaded.`

rods and provided near its ends with transverse openings, internally screw-threaded sleeves receiving the screw-threaded rods and being longitudinally movable thereon upon being rotated and having their rear ends closed by a solid portion of material integral therewith and carrying trunnions integral with the solid portions and extending within the transverse openings of the cross-heads to be rotatable therein, means for retaining the trunnions within the transverse openings of the cross-head, a feed screw engaging the cross-head, and means to rotate the feed screw.

Intestimony whereof we afiix our signatures in presence of two witnesses.

GEORGE W. MORGAN. LON EVANS. lVitnesses:

n S. OQMORGAN, A,n C. LANYON. 

